What is the approximate wavelength of a 2.4 GHz signal?

The wavelength (λ) of an electromagnetic signal is calculated by dividing the speed of light (c) by the signal's frequency (f). The speed of light is approximately 3 x 10⁸ meters per second. The frequency is 2.4 GHz, or 2.4 x 10⁹ Hz.

The calculation is: λ = (3 x 10⁸ m/s) / (2.4 x 10⁹ Hz) = 0.125 meters.

To convert this to centimeters, multiply by 100: 0.125 m 100 cm/m = 12.5 cm. Therefore, the approximate wavelength of a 2.4 GHz signal is 12.5 cm.

A. 2.4 cm is an incorrect calculation; it confuses the frequency value with the resulting wavelength.

C. 30 cm is the approximate wavelength for a 1 GHz signal, not a 2.4 GHz signal.

D. 1.25 m is the approximate wavelength for a 240 MHz signal, not a 2.4 GHz signal.

1. Halper, E. (2007). 6.002 Circuits and Electronics, Spring 2007. Massachusetts Institute of Technology: MIT OpenCourseWare. Lecture 1 Notes, Section: "Waves: frequency and wavelength," p. 2. Available: https://ocw.mit.edu/courses/6-002-circuits-and-electronics-spring-2007/resources/lecture-1/ (The notes explicitly state the formula λ = c/f).

2. Juniper Networks. (2021). Wi-Fi Fundamentals. Section: "RF Fundamentals," p. 11. This guide discusses the inverse relationship between frequency and wavelength, which is the principle behind the calculation.